* {
    box-sizing: border-box;
}

body {
  font-family: serif;
  font-size: 16px;
  line-height: 1.5;
  margin: 0 auto;
  max-width: 720px;
  padding: 0 1em;
}

a:link, a:visited {
  text-decoration: none;
}

a:hover, a:active {
  text-decoration: underline;
}

a, a:visited, a:hover, a:active {
  color: blue;
}

footer {
  margin-top: 1rem;

  a, a:link, a:visited, a:hover, a:active {
    text-decoration: none;
  }
}